Improved casing- for reverberatory and other furnaces



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W. F. DURFEE, or BRIDCEPCRT, CONNECTICUT. Letters Patent No. 87,152, dated Februa/ry 23, 1869.

I1VIPROVED CASIN G- FOR REVERBERATORY AND OTHER FURNACES.

The Schedule referred to in these Letters- Patent and making part: of the same.

The nature of this invention consists in forming the plates which are used to vencase reverberatory and other furnaces,V in such manner as to avoid all risk of breakage from expansion by the heat, to which they are liable, and at the sam-e time to diminish their size and weight, and also to so construct them that they will not radiate so much heat to the surrounding air, to the end that the construction of the furnaee-casings may be cheapened, and the furnace itself worked with greater' comfort to the workmen, and a diminished consumpltion of fuel; also to enable the furnace to be constructed and repaired with greater facility.

In' the accompanying sheet of drawings- Figure l represents a front elevation of a reverberating furnace cased with plates* constructed according to my invention.

Figure 2 4represents a horizontal section ofg. 1, on the line' A B.l

Figure 3 'represents anelevatiou of one of the plates Constructed according to my invention.

Figure 4 represents a horizontal section of g. 3, on the line U V.

Similar letters of referencerepresent like parts.

Instead of constructing the casings of furnaces in the ordinary manner, (viz, with plain plates of iron extending from top to bottom of the furnaee,-whieh plates are from one to one anda quarter inch in thickness, and without perforations, the plates on the front of the furnace being tied to those ouY the back by bolts, passing. through holes in the-tops of the front and back plates, respectively,) l construct them in the following manner, and to make the construction clear as possible, I will describe the construction of one bay or panel of the furnace-casing, all' the other bays or,`

panels being constructed in a similar manner, for which purpose I refer to the bay or panel S, iig. 1.

This panel is composed of a series of perforated plates, b b b b b, similar tothe plate represented by iig. 3, which are placed one above another, as represented,

each plate being provided'with two lugs, c c, tig. 3, on

each end, which, together with corresponding lugs on the adjacent plates in the next panel or bay, are clasped by the binder or buck-staff d d', said binder d d being divided vertically into two parts, as represented in fi gs. l and 2, these parts being secured together by two horizontal bolts, e e.

rlhe top of the binder d cl is secured to the top of the corresponding binder f f', on the back of the furnace, by two bolts, g g, one for each half of the binder.

The' bottom of the binder is secured by being inserted behind a lug, h h, which is cast upon the front of sill 'i offthe furnace, said sill being tied to ,a corre- /f/ sponding' sillon the back -of the furnace by a la/rge bolt, k k k, belowr the end of each binder. ,fg

The construction and peculiar connection of 'plates, binders,and sills, which is part of my invention, admit of the removal of an entire bay or panel of plates, without disturbing the adjoining panels, in the following manner: By removing that half of the binder d d which is in front of the plates in the bay or panel above named, all the plates can be removed at once with great ease. u

The plates themselves are constructed in such a manner as to admit of a circulation of air between the plates and the brick-work of the furnace. This is accomplished in the following manner: Each plate has, on the side next the brick-Work of the furnace, several vertical ribs of metal, ZZ, said ribs Zl being either east on the piate, or formed of bars of metal, m m, inserted between the plates and the brick-work. These ribs serve the purpose of keeping the bodyy of the plate away from the brick-work, and the air entering through the perforation in the plate, has a free circulation, in a vertical direction, between the lplates and the brickwork, thus keeping the plates cooler than they would be if their whole surface were in Contact with the brick-l work of the furnace, and enabling the workman to perform hisduties with greater comfort than possiblewith plates of the ordinary description.

The fact that the plates are perforated, and not entirely in Contact with the brick-work, enables the furnace to be heated with less fuel than is necessary in the case of plates of the ordinary description, as the re-brickof the furnace doesl not radiate heat to the air as readily as the cast-iron plates would do if they were in Close Contact with the brick-work.

The above-described method of constructing the plates admits of their being made much thinner than those constructed in the ordinary manner, but threequarters ofan inch in thickness being required between the ribs l l or 'm m.

What I claim as my invention, and desire to secure by Letters Patent, is-

l. The constlnction of the casings of reverberatory `or other' `furnaces, of perforated plates vb b b b b, binders d d', and sills t, all constructed, combined, and ar.

ranged substantially in the manner and for thepurpose hereinbefore specified.

2. The construction of each bay or panel of the casiugs of reverberatory or other furnaces, of perforated plates b b, which are placed one above another, as hereinbefore described.

3. The construction Aof the casings of reverberatory furnaces, of perbrated plates, with ribs l Least ou the back of each, or loose bars, m m, inserted between the plates and the brick-work of the furnace, for the purpose hereinbefore described.

W. F. DURFEE.

Witnesses:

Criss. M. DAY, f It. P. CHAPMAN. 

